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/* - mode: c; c-basic-offset: 2; indent-tabs-mode: nil; -*-
* vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
*
* Copyright (C) 2011, Brian Aker
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* * Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* * Neither the name of Patrick Galbraith nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*/
#pragma once
#include <drizzled/visibility.h>
#include <drizzled/sql/exception.h>
#include <drizzled/sql/result_set_meta_data.h>
#include <cassert>
#include <queue>
namespace drizzled {
namespace sql {
class DRIZZLED_API ResultSet
{
// First version of API stores everything as strings
class Column {
public:
Column() :
_is_null(false)
{ }
inline const std::string &value() const
{
return _value;
}
inline bool isNull() const
{
return _is_null;
}
inline void set_value(const std::string &ref)
{
_value= ref;
}
inline void set_null()
{
assert(_value.empty());
_is_null= true;
}
private:
std::string _value;
bool _is_null;
};
typedef std::vector< Column > Row;
typedef std::vector< Row > Result;
public:
static ResultSet *make(size_t field_count)
{
return new ResultSet(field_count);
}
bool next() const;
const std::string getString(size_t column_number) const ;
bool isNull(size_t column_number) const;
const ResultSetMetaData &getMetaData() const;
// Our functions to use instead of exceptions
bool error() const;
sql::Exception getException() const;
ResultSet(size_t fields) :
_has_next_been_called(false),
_current_row(_results.end()),
_meta_data(fields)
{
}
void setColumnCount(size_t fields)
{
_meta_data.setColumnCount(fields);
}
~ResultSet();
void createRow();
void setColumn(size_t column_number, const std::string &arg);
void setColumnNull(size_t column_number);
void pushException(const Exception &arg) const;
private: // Member methods
bool isMore() const;
bool isMore(size_t column_number) const;
private: // Member variables
mutable bool _has_next_been_called;
Result _results;
mutable Result::const_iterator _current_row;
ResultSetMetaData _meta_data;
// Because an error could come up during a fetch on const, we need to have
// this be mutable.
mutable std::queue<Exception> _exceptions;
};
std::ostream& operator<<(std::ostream& output, const ResultSet &result_set);
} // namespace sql
} // namespace drizzled
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